Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ef0b718068b5c3…

MALICIOUS

PDF

76.1 KB Created: 2021-05-11 17:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d24539a0e2e1ff39cb24869307a73241 SHA-1: 5fc430a445c968b76fb1c3d1f52f8e48a8ecfe36 SHA-256: b0ef0b718068b5c316ed249d4153663471a846dd07de40553359d799e6e80885
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. The presence of external URIs and the classification as a link farm further support this, as the primary goal appears to be directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/strik?utm_term=beginner+english+lessons+worksheets PDF link annotation
    • https://cdn.sqhk.co/piwewupovo/jjgZpgc/infinity_loop_game.pdfIn PDF document text
    • http://kudukulid.22web.org/dhakad_chora_2_full_movie_free.pdfIn PDF document text
    • http://seplafond.xyz/how_to_change_battery_in_nook_hd_plusex81a.pdfIn PDF document text
    • http://flymoney.net/zuguvuzimegosnmw9.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibefefu/gc7sfQ3/bumaduguzezosux.pdfIn PDF document text
    • http://shopsupergood.site/borderless_world_ohmae4a3nl.pdfIn PDF document text
    • http://snegny.com/appraisal_answers_uks0rs0.pdfIn PDF document text
    • http://mexicotop.xyz/weekly_meal_planner_template_word1xvsf.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/eojd4mW/pavur.pdfIn PDF document text
    • https://cdn.sqhk.co/wulupumiwi/ivjhheg/long_nails_meme_poop.pdfIn PDF document text
    • http://tegor.xyz/page_break_in_phpbwb4x.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/kagoxopemibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginubav.epizy.com/36078543754.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/crafting_guide_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5cac93-6357-4474-beeb-1e6590739bb8/pulowuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0948fb-410d-48b4-9920-ccb76155c66e/peter_pan_and_wendy_2021_release_date.pdfIn PDF document text
    • http://xuduvifeniwuzu.epizy.com/lizetiz.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/78030918078.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/writing_fractions_in_their_simplest_form_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3d10b0-4596-443c-8244-5862ecc30e6c/blackjack_pizza_tucson.pdfIn PDF document text
    • http://tijiwef.epizy.com/concrete_form_chamfer_strip.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 4940 bytes
SHA-256: 079a8c89bfb9f2c74e5d0fbd388342fae8dfcd27f181165759110f3fc94a63e7
font_01_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 10856 bytes
SHA-256: c89198e29699bdefa3cb74237b5f7370b05524ba19d3f43b3f693a787d6accf6

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